Something

public class Flash extends WebComponent implements IResourceListener {    public Flash(String id) {        super(id);    }    oncomponenttag(tag) {         tag.put("src",urlfor(IResourceListener.INTERFACE));    public void onResourceRequested() {        getrequestcycle().pushrequesttarget(new irequesttarget() {            respond(requestcycle rc) {                Resonse r=rc.getResponse();                r.getOutputStream().write(getFlash());          });       }    protected abstract byte[] getFlash();